A true-breeding strain of zebras that have 60 stripes is crossed with a true-breeding strain of...
A true-breeding strain of zebras that have 60 stripes is crossed with a true-breeding strain of zebras that have 0 stripes. All of the F1 zebras have 30 stripes. You cross many F1 zebras to each other to obtain a large F2 population. In the F2, there are some zebras with 0 stripes, some with 10 stripes, some with 20 stripes, some with 30 stripes, some with 40 stripes, some with 50 stripes, and some with 60 stripes. Approximately how many genes do you think contribute to stripes in zebras? Explain your answer and what rule you used
Homework Answers
Six genes are reason for this condition in zebra stripes.
Six subspecies of zebras roamed in plains of savannas of southern
and eastern Africa which have been defined on the basis of head
shape and the pattern of the animals stripes.
Due to lack of Melanin (a genetic condition),some zebras are born without stripes.
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A true-breeding strain of zebras that have 60 stripes is crossed
with a true-breeding strain of...
In snapdragons, when true-breeding red flowers are crossed with true-breeding white flowers, all the offspring exhibit...
In snapdragons, when true-breeding red flowers are crossed with true-breeding white flowers, all the offspring exhibit pink flowers. When true-breeding tall snapdragons are crossed with dwarf snapdragons, all the offspring are tall. A researcher decided to perform a dihybrid cross with the above characters and obtained all pink, tall snapdragons (F1). It was then decided to perform across with members of the F1 generation. What are the expected phenotypic ration for the F2 generation? (PLEASE INCLUDE LEGENDS, PUNNET SQUARES and...
A true breeding dominant plant (colored, green) is crossed with a true breeding recessive plant (colorless,...
A true breeding dominant plant (colored, green) is crossed with a true breeding recessive plant (colorless, yellow). The F1’s are then intercrossed to give the following F2 results: colored, green (C_G_) 180 colored, yellow (C_gg) 28 colorless, green (¢¢G_) 20 colorless, yellow (¢¢gg) 188 Perform a Chi-square test to determine whether the genes are linked or unlinked. What is your X2 value?
A male mouse from a true-breeding strain of hyperactive animals is crossed with a female mouse...
A male mouse from a true-breeding strain of hyperactive animals
is crossed with a female mouse from a true-breeding strain of
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progeny are lethargic. In the F2 generation, all offspring are
lethargic.
What is the best genetic explanation for these observations?
recessive then a If the lethargic gene is the F2 progeny would be immediate progeny. may be involved. In that case, some of lethargic because maternal effects are temporary, affecting...
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2. An animal scientist crossed a strain of large guinea pigs and a strain of small guinea pigs, and finds the Fı are phenotypically uniform, with an average size intermediate between the two parents. She allows the Fı individuals to inter-mate, resulting in 1014 F2 individuals (guinea pigs are prolific). In the resulting F2 generation, 4 guinea pigs were in the smallest size class (which is the same as the small parental line). a. From these data, estimate the number...
You conduct a cross between a true-breeding line of white fish and a true-breeding line of...
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2) Two true-breeding varieties of cucumbers (long and miniature) have been obtained. Long cucumbers are on average 12 inches upon reaching maturity, whereas short ones are about 2 inches long. Performing a cross between these varieties, you find that the F1 cucumbers are all around 7 inches. What single-locus mode of inheritance would lead to this outcome? In the F2 generation, you obtain cucumbers in five discrete size categories: 2, 4.5, 7, 9.5, and 12 inches. Is this what you would have expected...
A true breeding plant that produces white flowers is crossed with a true breeding plant that...
A true breeding plant that produces white flowers is crossed with a true breeding plant that produces red flowers. The resulting F1 are all plants with pink flowers. One of the pink-flowered plant is crossed to a true breeding white plant and 16 plants are produced. How many plants do you expect to see from each phenotype? Select one: a. 12 pink and 4 white b. 16 pink c. It is impossible to know due to linkage d. 8 red...
A female mouse from a true-breeding wild-type strain was crossed to a male mouse with apricot...
A female mouse from a true-breeding wild-type strain was crossed to a male mouse with apricot eyes (ap) and grey body (gy). The F1 mice were wild-type for both traits. When the F1 were interbred, the F2 were distributed as follows: Females all wild type 200 Males wild type 91 apricot 11 grey 9 apricot, grey 89 Which of the following statements is correct? A) ap and gy are unlinked B) ap and gy are linked on an autosome and...
2 vered A true breeding plant that produces white flowers is crossed with a true breeding...
2 vered A true breeding plant that produces white flowers is crossed with a true breeding plant that produces red flowers. The resulting F1 are all plants with pink flowers. One of the pink-flowered plant is crossed to a true breeding white plant and 16 plants are produced. How many plants do you expect to see from each phenotype? f 2.50 estion Select one: a. 16 pink b. 12 pink and 4 white c. 8 red and 8 white d....
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
A male mouse from a true-breeding strain of hyperactive animals
is crossed with a female mouse from a true-breeding strain of
lethargic animals. (These are both hypothetical strains.) All the
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lethargic.
What is the best genetic explanation for these observations?
recessive then a If the lethargic gene is the F2 progeny would be immediate progeny. may be involved. In that case, some of lethargic because maternal effects are temporary, affecting...
2. An animal scientist crossed a strain of large guinea pigs and a strain of small guinea pigs, and finds the Fı are phenotypically uniform, with an average size intermediate between the two parents. She allows the Fı individuals to inter-mate, resulting in 1014 F2 individuals (guinea pigs are prolific). In the resulting F2 generation, 4 guinea pigs were in the smallest size class (which is the same as the small parental line). a. From these data, estimate the number...
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